Concrete placing apparatus



April 11, Q JACKSON 2,154,207

CONCRETE PLACING APPARATUS Filed Jan. 10, 1936 5 Sheets-Sheet l Z Com/[U 35229017 ATTORNEYS Apiil 11, 1939. JACKSON 2,154,207

CONCRETE PLACING APPARATUS Filed Jan. 10, 1936 s Sheets-Shet 2 INVENTOR. Coma/U dad/mm ATTORNEY5 April 11, 1939. c, JACKSON 2,154,207

CONCRETE PLACING APPARATUS Filed Jan. 10, 1936 3 Sheets-Sheet 3 INVENTOR. Comm/l Jae/won ATTORNE Y3 Patehtod Apt; 11, 1939 UNITED STATES PATENT OFFICE extinct... scar I Application January 10, 1938, Serial No. 58,556

The main objects of this invention First, to provide a machine for the placement of concrete such as pavements, inclined walls of concrete ditches or conduits and the like which-v is of very large capacity and is highly emcient in the rapid and effective placement of concrete masses having a very large aggregateand/or low water content.

, crete.

Third, to provide a machine of this character which is of wideadaptability and which can be.

operated by comparatively unskilled labor.

Fourth, to provide a concrete placing machine which may be very economically produced and which is adapted for use in connection with propelling or tractor means of various types and for use in connection with paving machines or other concrete placing apparatus. Y

Qbjects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed ou in the claims.

A preferred embodiment of my invention is illustrated in the accompanying drawings, in

' plished by the finishing screed 6. i

which:

Fig. l is a fragmentary plan view of an embodiment of my invention designed to be propelled by a suitable tractor or propelling means not detailed herein.

Fig. 2 is a fragmentary vertical section on line 2-2 of Fig. 1.

Fig. 3 is a detail fragmentary view partially in elevation and partially in vertical section. on a line corresponding to line 3-3 of Fig. 5.

Fig. 4 is an enlarged fragmentary view partially in section on line 3-4 of Fig. 2.

Fig. 5 is a fragmentary view in section on line 5---5 of Fi 3.

Fig. 6 is a fragmentary view partially in longitudinal section of a modified form or embodiment oi? my invention on the broken line 6-45 of Fig. 7.

Fig. 7 is a fragmentary plan view of the embodiment shown in Fig. 6.

Referring to the embodiment of my invention illustrated in-Figs. l to 5 inclusive, I, I represent form members which areadapted to serve as rails lficlaims. (sin-4a) I reciprocating screed 6. This with an I-beam I, the I-beam being moimted onits shoe, the upper flange of the beam engagin the hanger which is provided with suitable antii'riction rollers 8 and 9. The screed is thus 5 mounted for horizontal reciprocatory motion, being driven from the engine it, the pitman or connecting rod l l connected to the screed being connected to the engine through a suitable transmission. The screedis preferably provided with 10 forwardly projecting end portions or wings i2. On the carriage in front of the screed I mount side plates i3, these side plates having outwardly directed front and rear ends. The side plates are mounted longitudinally of the carriage and at the inside of the wheels with the lower edges of the plates in substantially the plane of the bottoms of the wheels, orthe top of the tracks on which the wheels are traveling. These side plates. are adapted to support the piled-up concrete material indicated at M in advance of the vibratory element l5. This vibratory element is arranged between the side plates l3 preferably in advance of and in parallel relation to the screed. The member I5 is supported to carry along excess material and roughly level it oi as indicated at I8 ahead of the screed, the final finish being accom- The vibratory element I5 is vibrated at-hig frequency,at least about 3600 R. P. M, the ap- 80 paratus being especially designed for the placement of concrete according to the method claimed in my Patent No. 1,787,449, dated January 6, 1931.

A mass of concrete is subjected by'this vibratory element to high frequency vibrations so that concrete mixes of low or so-calledunworkable water content are. rendered workable and may beeifectively placed by means of this vibratory element and the coasting smoothing screed. The machine is also well adapted for use in the placeso ment of concrete having a large aggregate, the voids, even with large aggregate, being effectively filled or eliminated.

The vibratory member 86 is preferably of substantial diameter so that it does serve as a screed d5 to roughly place the concrete. It is, however, preferably cylindrical as illustrated and, of a length so that its ends are quite close to the side plates l3. Housed within the vibratory element is a rotor preferably in the form of a shaft i1 having supporting bearings 8 at its ends carried by the wall ofthe vibratory element. Unbalancing weights l9 are arranged on the shaft ad- J'acent its ends or its bearings.

The vibratory element is carried by a tubular screedisprovided cross pieces 29 on the bars 2|.

or hollow upright 20 disposed centrally thereof, this upright being mounted on the longitudinal bars 2| by means of the flexible supports 22, these flexible supports being preferably in the form of pieces of rubber or elastic tubing clamped on the studs 23 on the housing and the studs 25 on the In the embodiment illustrated, the rotor is 20 driven from a suitable motor indicated at 30, the

shaft 3| of which is provided with pulleys 32 connected to the pulley 33 on the shaft I! by means of the belts 34 disposed longitudinally through the upright 20. The belts are thus effectively 25 protected and the vibrating means may be driven by a gas engine or the like. I have illustrated a direct connection to the shaft 3| although it will be understood that a variable speed or other transmission may be provided if desired.

In the embodiment shown in Figs. 1 to 5, the propelling means is indicated at 35.

In the embodiment shown in Figs. 6 and '7, the vibratory member I is mounted on a two-wheel carriage 36, the carrying wheels 31 being arranged in advance of the vibratory member. This carriage is provided with a pair of rearwardly projecting push bars 38 having a series of holes 38 with which the pivot 40 of the arm ll on the rockshaft 42 may be engaged. This rockshaft is controlled by the lever 43 which may be manipulated to raise or lower the rear ends of the bars 38 and thus tilt the frame 36 on its carrying wheels or the axis of its carrying wheels. The upright 20 is mounted through its flexible supports 22 to these bars 33 so that by raising and lowering the rear ends of the bars and by selectively engaging the pivot 40 with the holes 39, the relation of the vibratory member to the screed 44 both vertically and horizontally or to and from the screed may be varied.

Side plates 45 corresponding generally to the side plates l3 are provided, the rear ends of these side plates being adjacent the screed and projecting to the rear of the vibratory member to support the mass of concrete i l in advance of the screed. In both of these embodiments, the ends of the side plates are preferably turned outwardly to extend across the forms as shown at 46. The vibrating means of this embodiment is substantially the same as that described.

The screed 44 is also mounted for reciprocatory movement, the mounting means being substantially that described for the previously described embodiment.

This embodiment shown in Figs. 6 and 7 is adapted to be used in connection with certain types of paving machines now in use and may be readily applied thereto.

Both embodiments are designed'to produce a very simple and economical apparatus or machine which is at the same time effective in operation.

I have illustrated two adaptations or embodiments which I consider highly practical. I have not attempeted to illustrate or describe other embodiments or adaptations as it is believed that this disclosure will enable those skilled in the art to embody or adapt my improvements as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: g

1. In a machine of the class described, the combination with a wheeled carriage, of a screed mounted on said carriage for horizontal reciprocatory motion, side plates mounted on said carriage in front of said screed and at the inside of the carriage wheels with their lower edges in approximately the plane of the bottom of the wheels, a tubular cylindrical vibratory element disposed in advance of said screed between said side plates, said vibratory element being provided with a tubular upright opening to said vibratory element, a flexible supporting means for said upright including a cushioned laterally projecting supporting arm for maintaining the upright in upright position, an unbalanced rotor mounted within said vibratory element, a motor mounted on said carriage, and driving connections therefor to said rotor including a transmission belt disposed through said upright.

2. In a machine of the class described, the combination with a wheeled carriage, of a screed mounted on said carriage for horizontal reciprocatory motion, side plates mounted on said carriage in front of said screed and at the inside of the carriage wheels with their lower edges in approximately the plane of the bottom of the wheels, a vibratory element disposed in advance of said screed between said side plates, said vibratory element being provided with an upright, a flexible supporting means for said upright including a cushioned laterally projecting supporting arm for maintaining the upright in upright position, and a vibrating means carried by said vibratory element.

3. In a machine of the class described, the combination with a wheeled carriage, of side plates mounted on said carriage at the inside of the carriage wheels with their lower edges in approximately the plane of the bottom of the wheels, a tubular cylindrical vibratory element disposed between said side plates, said vibratory element being provided with a tubular upright opening to said vibratory element, a flexible supporting means for said upright including a cushioned laterally projecting supporting arm for maintainingthe upright in upright position, an unbalanced rotor mounted within said vibratory element, a motor mounted on said carriage, and driving connections therefor to said rotor including a transmission belt disposed through said upright.

4. In a machine of the class described, the combination with a wheeled carriage, of side plates mounted on said carriage at the inside of the carriage wheels with their lower edges in approximately the plane of the bottom of the wheels, a vibratory element disposed horizontally between said side plates, said vibratory element being provided with an upright, a flexible supporting means for said upright including a cushioned laterally projecting supporting arm for maintaining the upright in upright position, and a vibrating means carried by said vibratory element.

5. In a machine of the class described, the combination with a wheeled carriage, of a tubular cylindrical horizontally disposed vibratory element provided with a tubular upright opening to said vibratory element. a flexible supporting means for said upright including a cushioned an angle to said flexible supports for maintaining the upright in upright position, and a vibrating means for said vibratory element.

'7. In a machine of the class described, the combination with a carriage, of longitudinal side plates mounted on said carriage, a horizontally disposed vibratory element, means for resiliently supporting said vibratory element transversely between said side plates and for vertical adjust- 2 ment independently of said plates, and vibrating and in relation thereto to support the concrete acted upon by the vibratory element, and means for vibrating said vibratory element at high frequency.

10. In a machine of the class described, the

combination with a main carriage, of a screed mounted on said main carriage, an auxiliary carriage, side plates mounted on said auxiliary carriage at the inside of the wheels thereof, a tubular vibratory element resiliently mounted on said auxiliary carriage between said side plates, a motor mounted on said auxiliary carriage. an unbalancing rotor within said vibrating element, driving connections from said motor to said rotor, and a push bar for said auxiliary carriage mounted on said main carriage for longitudinal and verticai'adjustment whereby the position of the vibratory element relative to the screed may be varied vertically and horizontally. I

11. In a machine of the class described, the combination with a main carriage, of a screed mounted on said main carriage, an auxiliary carrlage, a tubular vibratory element resiliently mounted on said auxiliary carriage. a motor mounted on said auxiliary carriage, an unbalancingrotor within said vibrating element. driving connections from said motor to said rotor, and a push bar for said auxiliary carriage mounted on said maincarriage for longitudinal and vertical adjustment whereby the position of the vibratory element relative to the screed may be varied vertically and horizontally.

12. In a machine of the class described, the combination with a main carriage, of a screed mounted on said main carriage, an auxiliary carriage, side plates mounted on said auxiliary carriage at the inside of the wheels thereof, a vibratory element mounted on said auxiliary carriage between said side plates, means for vibrating said vibratory element at high frequency, and a push bar for said auxiliary carriage mounted on said main carriage for longitudinal and vertical adjustment whereby the position of the vibratory element relative to the screed maybe varied vertically and horizontally.

13. In a machine of the class described, the combination with a main carriage, of a screed mounted on said main carriage, an auxiliary carriage, side plates mounted on said auxiliary carriage at the inside of the wheels thereof, a vibratory element mounted on said auxiliary carriage, means for vibrating said vibratory element at high frequency, and a push bar for said auxiliary carriage mounted on said main carriage for iongitudinal and vertical adjustment whereby the position of the vibratory element relative to-the screed may be varied vertically and horizontally.

14. In a machine of the class described, the combination with a main carriage, of an auxiliary carriage, a horizontallv' disposed vibratory element mounted on said auxiliary carriage, means for vibrating said vibratory element at high frequency, and a push bar for said auxiliary carriage mounted on said main carriage fpr longitudinal and vertical adjustment whereby the position of the vibratory element may be varied vertically and horizontally.

15. In a machine of the class described, the combination of a two-wheeled carriage, a vibratory element mounted on said carriage horizontally and transversely of its path of travel, means for vibrating said vibratory element at high frequency, the vibrating element being arranged at the rear of the axis of the wheels, and a rearwardly projecting supporting and propelling bar for said carriage provided with means for ad- :lustably simporting its rear end.

16. A machine of the class described comprising a main carriage, a screed mounted on said main carriage, an auxiliary carriage provided with a pair of supporting wheels, said carriage beingprovidedwithapropellingandmmmrting bar mounted on said main carriage for longitudinal and vertical adjustment, and a vibrating stantially at the rear of its traction wheels and in advance of and in parallel relation to said screed on said main carriage.

OORWIIL' JAM. 

